Cost to build a small tower for a ubiquity repeater ?

Hi- I would like to bring high speed internet to a remote location in a valley 12km from the nearest cell tower. We will need 2TB per month.

Unfortunately, the location is behind a ridge, and does not have line of sight to the tower. I was thinking that the best option might be to lease some bandwidth from the tower owner and place a ubiquity dish on their tower, beam internet to another ubiquity dish mounted on a small tower on the ridge that we will we'll construct on the ridge, then beam it the last 2km to the location.

Is that a reasonable solution?

If so, what costs might be involved?

Buying 2TB per month from the tower owner Building our own small tower 10km away, with its own solar or propane power unit ubiquity dishes

Any advice or cost estimates much appreciated !